Breaking

FILE - In this Jan. 11, 2014 photo Dennis Olsen measures a fissure which he said was about an inch wide and at least eight to ten inches deep, in his rural driveway following a frost quake in Waupun, Wis. Known technically as cryoseism, frost quakes are a rare natural phenomena that happen when the temperature drops suddenly, causing moisture in the ground to freeze and expand. They can cause an earthquake-like rumble sometimes with loud, booming noises. (AP Photo/The Reporter, Aileen Andrews, File)